GLAYVA MAN(bendigo) replied:

gday mark.
my gq usually sits on about 4 but when its cold 6-8 if backing of down a hill 6-8.
i wouldnt be to concerned original guage probly not that spot onjamieson wild cat

Martyn (WA) replied:

Mark,
I have a 92 GQ, the oil pressure read anywhere between .5 and 4 dpending on a lot of things, tyre pressures, ambient temp, speed, how many people are in the fourby etc etc. The gauges on the 4.2 aren't known for their accuracy, as long as the light goes out and the gauge moves you're right. Going higher than 4 is unusual and not something I personally have heard of before, you must have the optimists gauge. There are a number of threads talking about this topic have a look. This is all my opinion stuff as usual. Keep the shiny side up

David N. replied:

There are many previous posts re these gauges. (sender problem)
I got sick of mine and put a mechanical full swing VDO so now I know I have good oil pressure.

peterK replied:

Mark
I did a sender unit in the High Country at xmas, the indication was the guage sat high 6-8, but stayed there. Also my oil light came on - but not a full glow (i know it doesnt have variable settings - but I have witnesses).
Not much help I know, but at the same time I cooked a battery - so I think that may actually have triggered it all.
My understanding is that Nissan took out the guage in the GU, as it wasnt that accurate anyway.
cheers
peter

floyd replied:

The sender is the problem. It is common on Patrols. I had one that started to read low and Nissan checked the pressure with a special funky device and said that the pressure was fine. Had 2 senders put in until one of them read the same as the special funky device. Aparently this is common on all of these models. Get it checked so as you sleep well and then get a good sender so as it reads right.

Willie replied:

My oil pressure guage has been lying on zero for years. The sender is crook and I could not loosen it from the block.This would have meant drilling it out and running a tap back into the block in fitting a new sender. Decided not to worry about it and disconnected the lead.
Cheers,
WillieNever a dull moment

Big Trev replied:

I have had my 1989 Nissan Maverick / Ford Patrol (Diesel) for 12 years, it has only now done about 170,000. The oil pressure gauge has read low since day dot. It will read a little higher after an oil change, or when its cold, but it generally sits in the bottom 1/8th or 1/4 of the gauge. I am not at all worried about it. Great motor, very hard to break.